Ceramic Proppant Gas and Oil fracture proppants Specifications 1.low density,middle density,high density 2. Increase ... in building materials, gardening, refractory insulation materials, Chemical, oil, gas and other departments. Grit size available: 12-20,16-20,16 ... for supporting fissure of stratum fracturing transformation of deep oil and gas field. 2. Enhance permeability of stratum Circulate oil ...